How to "dumb down" Farseer

I'm using Farseer as my physics engine in my game and am trying to optimize it as best as I can for Xbox. There are many things to Farseer that I don't need such as any kind of spring. I don't know EVERYTHING to Farseer by any means which is why I am here
to ask for help. Is there anything I can essentially "turn off" from being done. Heck I may be totally off of what I'm saying. I just need some way to optimize it better to Xbox. ANY ideas are welcome!

Ok cool! Thanks for the reply on that. Now are there other ways to optimize. Like right now, I have it when enemies get so far away from the main character. I have them become "inactive" and they aren't updated. I know you can use an inactivity
controller(?) and other things to optimize but what specifically is there? Or could someone at least point me in the direction that I should look for all of this stuff? I've been looking through the different things available on bodies and geoms but haven't
looked too much further outside of that.

I read that current projects shouldn't be moved over to 3.0 if 2.0 is being used. Is it a hard switch? I haven't been following very strong all of the differences in coding for it. I took some look at Box2D and everything but have been holding off until
there is a 3.0 out.